集成式油气减震器的动力学特性实验建模研究

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (20) : 112-117.

论文

林德昭1，杨帆1，巩笛1，赵峰1，梁智深2

作者信息 +

Experimental modeling of an integrated hydro-pneumatic strut

LIN Dezhao1，YANG Fan1，GONG Di1，ZHAO Feng1，LIANG Zhisheng2

Author information +

文章历史 +

摘要

本文针对一种气室内置于活塞杆内且通过浮动活塞实现油气分离的集成式油气减震器进行实验建模研究，为这种油气减震器能够得到有效应用提供基础。由于该类油气减震器结构上的特殊性，对油气的封严提出了较高要求，从而导致摩擦力特性在针对其的动力学特性描述中起到了关键性的作用。本文针对独立设计的该种集成式油气减震器样件开展动力学测试；在大量实验数据分析的基础上，提出了基于双曲正切回滞模型和纯干表面的双曲正切摩擦模型的组合摩擦力模型，以描述该实验样件的摩擦特性所体现的库伦摩擦、粘性摩擦、Stribeck效应与迟滞现象的综合效应，并受运动速度和系统压力的影响。最后通过模型仿真数据与实验数据的比对以验证模型的准确性。

Abstract

In this paper, one type of integrated hydro-pneumatic strut(HPS), which integrates an internal gas chamber in the rod part and a floating piston used to separate gas from oil was investigated based on an experiment.The main purpose of this research is to invesitgate fundamental dynamic properties for this kind of HPS, and then provides theoretical basis for practical applications.Due to the high standard of seal, the friction characteristic is playing a main role in the dynamic property of this type HPS.It can be found from experiments that the friction properties of this type of HPS is the combination of multiple different friction phenomenon, which includes coulomb friction, viscous friction, Stribeck effect and hysteresis, affected by the system pressure and motion velocity.Considering the above, a novel friction model, which combines the hyperbolic tangent hysteresis model and the friction model for pure sliding and oscillating sliding contacts, has been proposed to describe the friction properties.The model parameters have been identified based on the experimental data.Finally, the effectiveness and accuracy of the friction and dynamic force models has been verified through comparison of the experimental data and the simulation result.

导出引用

林德昭1，杨帆1，巩笛1，赵峰1，梁智深2. 集成式油气减震器的动力学特性实验建模研究[J]. 振动与冲击, 2019, 38(20): 112-117

LIN Dezhao1，YANG Fan1，GONG Di1，ZHAO Feng1，LIANG Zhisheng2. Experimental modeling of an integrated hydro-pneumatic strut[J]. Journal of Vibration and Shock, 2019, 38(20): 112-117

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